This is a well-known result [1]}, [2]} and is the simplest representation of a primarily horizontal groundwater system. If \(F\)  is known, the Laplacian can be solved numerically for \(h^2\)  with relative ease. It is, however, severely restricted by the assumption that \(K\)  is constant (both horizontally and vertically). It's not appropriate for deep or heterogeneous aquifers, where \(K\)  varies by significant factors. Nevertheless, it illustrates the fact that an unconfined aquifer with nearly horizontal flow is mediated by the balance of two parameters. These are the source term \(F\) , which is the net recharge, and the hydraulic conductivity \(K\) , which defines the system's drainage agility.
